The location he gave the boy in Heropa wasn't too hard to find, infact, the park was rather close to where the porter was that led to Heropa from the other imPort cities. You could see the trees sitting amidst the buildings not far to the left, so the address he gave lead to a whole block of an area. He's be a little surprised to hear if he couldn't find it.

And there he sat, enjoying the park for it's spread out company and cool air. Hisoka sat at one of the stone sets of chairs and chess tables in an area the park paths all seemed to converge into. Cards in hand, he shuffled quietly as he sat, wearing the brightest clothes in the park and quite possibly outing himself to Yang as the person he was meeting.

That- and possibly making Yang now question his decision to meet up with this person.